Integrated induction transformer capable of preventing magnetic core from cracking
By designing an integrated inductor transformer, the problems of easy core cracking and large board area in traditional on-board chargers are solved, and the reliability and space utilization efficiency are improved under high frequency, high temperature and high stress environment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU JINZHICHUAN ELECTRONICS
- Filing Date
- 2025-03-25
- Publication Date
- 2026-05-12
AI Technical Summary
In the LC circuit of traditional on-board chargers, the transformer and resonant inductor occupy a large area of the board and the magnetic core is prone to cracking, which increases the risk, especially in high-frequency, high-temperature and high-stress environments.
An integrated inductor transformer is adopted. The magnetic core is formed by bonding three base plates (first base plate, second base plate and common base plate) together with an I-shaped magnetic core. Combined with the design of magnetic pillars and air gap gaskets, the transformer and inductor windings are wound on different magnetic pillars and share a common base plate, reducing the board area occupied.
Under high frequency, high temperature and high stress environment, the magnetic core is not easy to crack, the service life is extended, the board area is reduced, and the cost is reduced.
Smart Images
Figure CN224232459U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of on-board charger technology, and in particular to an integrated inductor transformer that avoids core cracking. Background Technology
[0002] Traditional on-board chargers (OBCs) typically contain an independent transformer and an independent resonant inductor in their LC circuits, which result in a large board area and high cost. Furthermore, their magnetic cores are molded and come in shapes such as PQ, EQ, EDX, and UU, which pose a risk of core cracking in high-frequency, high-temperature, and high-stress environments. Utility Model Content
[0003] In view of the problems of large board area and easy cracking of magnetic core in existing technical solutions, transformers and resonant inductors are provided by this invention to avoid magnetic core cracking.
[0004] This utility model provides the following technical solution: an integrated inductor transformer that avoids core cracking, comprising:
[0005] The magnetic core includes a first base plate, a second base plate, and a common base plate disposed between the first base plate and the second base plate. The first base plate, the second base plate, and the common base plate are all formed by bonding two I-shaped magnetic cores together. A pair of first magnetic pillars are disposed between the first base plate and the common base plate, and a pair of second magnetic pillars are disposed between the second base plate and the common base plate. Air gap pads are disposed between the second magnetic pillars and the second base plate or the common base plate. Gaps are provided between the pair of first magnetic pillars and between the pair of second magnetic pillars.
[0006] The windings include a transformer winding wound on a pair of first magnetic posts and an inductor winding wound on a pair of second magnetic posts.
[0007] Preferably, it also includes a base, which is provided with a mounting groove that mates with the first base plate, the second base plate, and the common base plate.
[0008] Preferably, a pair of first magnetic posts are sleeved with a first frame, and the transformer winding is wound on the first frame; a pair of second magnetic posts are sleeved with a second frame, and the inductor winding is wound on the second frame.
[0009] The beneficial effects of this utility model are: the three base plates of the magnetic core are all made of two I-type magnetic cores bonded together, which are not easy to crack in high frequency, high temperature and high stress environment and have a long service life; the transformer and inductor are integrated together and share a base plate to reduce the area occupied by the plate. Attached Figure Description
[0010] Figure 1 This is a three-dimensional diagram of one embodiment of an integrated inductor transformer.
[0011] Figure 2 This is a three-dimensional diagram of one embodiment of the magnetic core.
[0012] Reference numerals: 11. First base plate; 12. Second base plate; 13. Common base plate; 14. First magnetic column; 15. Second magnetic column; 16. Air gap gasket; 20. Type I magnetic core; 31. Transformer winding; 32. Inductor winding; 40. Base; 41. Mounting slot; 51. First frame; 52. Second frame. Detailed Implementation
[0013] The embodiments of this utility model will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.
[0014] This utility model provides, for example Figure 1-2 An integrated inductor transformer shown in the figure to avoid core cracking includes a base 40, a magnetic core disposed on the base 40, and windings.
[0015] The magnetic core includes a first base plate 11, a second base plate 12, and a common base plate 13 disposed between the first base plate 11 and the second base plate 12. The first base plate 11, the second base plate 12, and the common base plate 13 are all made of two I-shaped magnetic cores 20 bonded together. The structure is simple, not easy to crack in high frequency, high temperature and high stress environment, and has a long service life.
[0016] A pair of first magnetic posts 14 are disposed between the first base plate 11 and the common base plate 13, forming a closed magnetic circuit with the first base plate 11 and the common base plate 13, and a large gap is provided between the pair of first magnetic posts 14; each pair of first magnetic posts 14 is sleeved with a first frame 51, and a transformer winding 31 is wound on the first frame 51. The transformer winding 31 includes a primary winding and a secondary winding, which are wound on the two first frames 51 respectively. The above components constitute a transformer.
[0017] A pair of second magnetic posts 15 are disposed between the second base plate 12 and the common base plate 13, forming a closed magnetic circuit with the second base plate 12 and the common base plate 13, and a large gap is provided between the pair of second magnetic posts 15; each pair of second magnetic posts 15 is sleeved with a second frame 52, and an inductor winding 32 is wound on the second frame 52. The above components constitute an inductor. The inductor and the transformer are integrated together and share a base plate to reduce the board area occupied.
[0018] Furthermore, an air gap gasket 16 is provided between the second magnetic post 15 and the common base plate 13, the thickness of which can be adjusted as needed. In other embodiments, the air gap gasket can be provided between the second magnetic post 15 and the second base plate 12.
[0019] The base 40 is provided with a mounting groove 41, and the first base plate 11, the second base plate 12, and the common base plate 13 are fitted with and bonded to the mounting groove 41.
[0020] The transformer windings and inductor windings are wound in accordance with relevant technologies, and the diameter and number of single wires in the windings can be adjusted according to the current and frequency to increase power. Both the first and second frames are made of insulating materials.
[0021] The above describes one or more embodiments of this utility model in a relatively specific and detailed manner, but it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. An integrated inductor transformer that avoids core cracking, characterized in that, include: The magnetic core includes a first base plate, a second base plate, and a common base plate disposed between the first base plate and the second base plate. The first base plate, the second base plate, and the common base plate are all formed by bonding two I-shaped magnetic cores together. A pair of first magnetic pillars are disposed between the first base plate and the common base plate, and a pair of second magnetic pillars are disposed between the second base plate and the common base plate. Air gap pads are disposed between the second magnetic pillars and the second base plate or the common base plate. Gaps are provided between the pair of first magnetic pillars and between the pair of second magnetic pillars. The windings include a transformer winding wound on a pair of first magnetic posts and an inductor winding wound on a pair of second magnetic posts.
2. An integrated inductor transformer for avoiding core cracking according to claim 1, characterized in that, It also includes a base, which is provided with a mounting groove that mates with the first base plate, the second base plate, and the common base plate.
3. An integrated inductor transformer for avoiding core cracking according to claim 1, characterized in that, A pair of first magnetic posts are sleeved on a first frame, and the transformer winding is wound on the first frame; a pair of second magnetic posts are sleeved on a second frame, and the inductor winding is wound on the second frame.